Spinning centrifugal motor arrangement



s. ODAJIMA 2,043,552 SPINNING CENTRIFUGAL MOT OR ARRANGEMENT Filed 001;. 9, 1934 Ill/1111111111111,

M VEA/TO SHUZO Gaga g f7 TTOEA/EYS Patented inn e 9, 1936 PATENT OFFICE SPINNING GENTRIFUGAL MOTOR ARRANGEMENT Shnzo Odaiima, Toba-m'achi, Shims-gun, Japan,

assignor to Kobe Seiko-sho, Ltd., Kobe, Japan Application October 9, 1934, Serial No. 747,517

1 Claim. (CL 11'l-2'l.5)

This invention relates to spinning centrifugal motor arrangements and particularly to an arrangement for eliminating the vibration of the pot wherein a movable revolving weight is placed 5 on the lid of the case covering the motor and wherein a guide is provided between the case and the pot. 1

An object of this invention is to provide a device of this type capable of controlling vibrations of the motor and case for the p p se of saving consumption of electric power.

1 As it is well known, air disturbances created by the revolutions of the pot are suiflci'ently powerful to increase the consumption of electric power while operating a spinning centrifugal motor. If the pot is covered by a case provided with a lid, substantially conforming to the contour of the pot but a littlelarger in size, so that a narrow space is left around the pot, the consump- 2c tion of electric power is reduced in a remarkable degree for the reason that the volume of air, which is disturbed by the revolutions of the pot, is iimited to that confined within the case. However, such arrang'ements render the operation of the motor unstable for the following reasons:-

If the potis covered by the case, it is practically impossible to provide a .free space of the same dimensions between the covering case and the pot so thatvarious currents of air will be produced around the pot by its revolutions and, naturally, the pressure upon one part of the covering case andlid will be different from thatupon another part, which will cause the case and lid to start vibrating vertically ,and horizontally.

Vibrations thus caused, increase gradually, and, make it impossible to lizeep the motor-further inoperation. I

In order to control such vibrations, a lid of heavy weight may be used, or the case and lid method does not succeed in lessening the-volume of air disturbed byrevolutions of the pot, orin saving the consumption of electric power.

By these well lsnown methods, percussions of the pot against the covering case cannot be avoid- I ed when the motor is put into motion or when' the brakes are applied, which, consequently, causes considerable wear of the pot.

By experiment, I found that when a proper guide was provided between the pot and the-case I and at the inside thereof,'the percussions of the 5 pot against the case when the motor was put into motion could almost be eliminated, rendering the V the inside of the case, the motion of themotor 10 will become smooth for the reason that the vibration of the pot at the time the motor is put into motion, is considerably reduced because of the; narrow space between the pot and the guide. 7 The percussions of the pot against the covering 15v case can be entirely eliminated if the guide is provided between the shaft of the pot and the base of the covering case, and the space between the guide and the shaft is narrower than the space between the pot and the .covering case as shown 20 in the attached drawing.

In'order to control the vibration of the pot and case after the motor has been put into motion and during further operation, thereof, I fixed on the lid, a proper weight and investigated 25- the .result of the experiment by changing the position 'of the fixed weight on the lid and found that the vibration could be controlled when the weight was placed close to the shaft. It was furthermore found that the closer to the shaft the so weight was placed, the lighter a weight could be used to control the vibration. As a result of this experiment, I. found that a lighter weight will serve the Purpose if the same is fixed exactly at the center of vibration upon the surface of the -36 lid. The center of vibration may technically be said to coincide with the-center line of the axis of the motor, but it is practically impossible even after such center has been determined.

Another experiment was carried out in the following -manner:'I placed a freely movable 45 weight upon the surface of the lid and found that while the case was vvibrating the weight being unable to rest there, started to perform turning movements on the lid towards the center of vibration and finally coming to rest in a cer- 50 A tain position on the lid. In this position, the vibration of the lid gradually subsided, resulting in a'smoothoperation of the motor. It was also "fixed weight employed in the preceding exaround the pot.

- periment.

.the covering case attached to the frame of .a

spinning centrifugal motor.

Figure 2 shows a vertical section of the lid.

Figure 3 shows a front view of the pot and a vertical section of the casein which the lid itself is used as a movable weight.

Figure 4 shows a front view of the pot and a vertical section of the case in which the movable and revolving weight is placed on a special support attached to the case.

InFigure 1, i isapotand2isacasecovering the pot and similar to the pot in shape but a. little larger in size allowing a narrow space 3 is the motor frame and .3 is a lid covering the case having an opening 5 for the yarn. A ring-formed weight 6 is held on the flanges i and 8 is a narrow space between the weight and the flanges i which permits the ring to move and revolve freely within the flange. 9 is a guide member provided between the shaft and the base of the case and at the inside thereof.

In order to secure maximum emciency it is advisable to insert some elastic material l0 under the ring 6 as illustrated in Figure 2, for the reason thatwhen an elastic material is inserted between the ring 8 and the lid 4, the ring moves not only quietly but also smoothly, since it is not involved in vertical movements in conjunction with the lid, even if the lid is caused to move up and down.

In the arrangement shown in Figure 3, the weight of the lid itself is used to control the vibration. For this purpose the inner diameter of the lid should be longer than the outer diameter of the brim so as to permit the lid to revolve on the brim of the case. The elastic material I0 is provided between the brim of the case and the lid. When the case is vibrated, the lid immediately starts to oscillate on the brim, but as soon as the center of gravity of the lid and the center of vibration coincide, the oscillations of the lid cease and the vibrations are put under complete control.

In the arrangement illustrated in Figure 4, the freely movable revolving ring 6 is placed on a support ii carried by the base of the covering case. In this particular modification, the lid may be made light so as to facilitate its removal during operation. .It'is'manii'est that many variations of the above features may be resorted to, such as placing the guide at the upper part of the case between the case and the pot instead of at the base as illustrated in the drawing. It is also obvious that the guide may be connected with the pot or the shaft through the medium of a spherical contactor or some other contactor having a low frictional coefficient.

Having now particularly described the invention, I claim:

In a spinning centrifugal motor device, in combination with a. pot having a shaft adapted to be mounted on the motor frame, a case covering said pot and conforming substantially to the contour thereof, the walls of said case being spaced from said pot, whereby a chamber is formed intermediate said pot and said case, guiding means for said shaft carried by the inside wall of said case, a: support carried by the outside wall of said case, and a movable and revolving ring freely mounted upon said support.

SHUZO ODAJIMA. 

